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69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
/* Copyright (C) 2002-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdlib.h>
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#include "pthreadP.h"
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void *
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__pthread_getspecific (key)
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pthread_key_t key;
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{
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struct pthread_key_data *data;
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/* Special case access to the first 2nd-level block. This is the
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usual case. */
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if (__glibc_likely (key < PTHREAD_KEY_2NDLEVEL_SIZE))
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data = &THREAD_SELF->specific_1stblock[key];
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else
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{
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/* Verify the key is sane. */
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if (key >= PTHREAD_KEYS_MAX)
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/* Not valid. */
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return NULL;
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unsigned int idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
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unsigned int idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
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/* If the sequence number doesn't match or the key cannot be defined
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for this thread since the second level array is not allocated
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return NULL, too. */
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struct pthread_key_data *level2 = THREAD_GETMEM_NC (THREAD_SELF,
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specific, idx1st);
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if (level2 == NULL)
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/* Not allocated, therefore no data. */
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return NULL;
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/* There is data. */
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data = &level2[idx2nd];
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}
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void *result = data->data;
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if (result != NULL)
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{
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uintptr_t seq = data->seq;
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if (__glibc_unlikely (seq != __pthread_keys[key].seq))
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result = data->data = NULL;
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}
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return result;
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}
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strong_alias (__pthread_getspecific, pthread_getspecific)
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hidden_def (__pthread_getspecific)
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